56-762 | This Day in Aviation

NASA test pilot Einar K. Enevoldson in the cockpit of a NASA/Lockheed F-104N, N811NA, in 1984. (NASA)

13 December 1958: First Lieutenant Einar Knute Enevoldson, U.S. Air Force, set seven Fédération Aéronautique Internationale (FAI) time-to-climb records in a Lockheed F-104A-10-LO Starfighter, serial number 56-762,¹ at Naval Air Station Point Mugu (NTD) (located on the shore of southern California), including Sea Level to 3,000 meters (9,843 feet) in 41.85 seconds; 6,000 meters (19,685 feet) in 58.41 seconds; 9,000 meters (29,528 feet) in 1 minute, 21.14 seconds; 12,000 meters (39,370 feet) in 1 minute, 39.90 seconds; 15,000 meters (49,213 feet) in 2 minutes, 11.1 seconds; 20,000 meters (65,617 feet) in 3 minutes, 42.99 seconds; and 25,000 meters (82,021 feet) in 4 minutes, 26.03 seconds.

Lockheed F-104A Starfighter 56-762 being prepared for a record attempt at NAS Point Mugu. (F-104 Society) — Lockheed F-104A-10-LO Starfighter 56-762 being prepared for a record attempt at NAS Point Mugu, California. (International F-104 Society)

Lieutenant Enevoldson was awarded the Distinguished Flying Cross for these accomplishments.

FAI Record File Num #9107 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 3 : turbo-jet
Type of record: Time to climb to a height of 3 000 m
Performance: 41.85s
Date: 1958-12-13
Course/Location: Point Mugu, CA (USA)
Claimant Einar Enevoldson (USA)
Aeroplane: Lockheed F-104A “Starfighter”
Engine: 1 G E J79

FAI Record File Num #9106 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 3 : turbo-jet
Type of record: Time to climb to a height of 6 000 m
Performance: 58.41s
Date: 1958-12-13
Course/Location: Point Mugu, CA (USA)
Claimant Einar Enevoldson (USA)
Aeroplane: Lockheed F-104A “Starfighter”
Engine: 1 G E J79

FAI Record File Num #9105 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 3 : turbo-jet
Type of record: Time to climb to a height of 9 000 m
Performance: 1 min 21.14s
Date: 1958-12-13
Course/Location: Point Mugu, CA (USA)
Claimant Einar Enevoldson (USA)
Aeroplane: Lockheed F-104A “Starfighter”
Engine: 1 G E J79

FAI Record File Num #9104 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 3 : turbo-jet
Type of record: Time to climb to a height of 12 000 m
Performance: 1 min 39.90s
Date: 1958-12-13
Course/Location: Point Mugu, CA (USA)
Claimant Einar Enevoldson (USA)
Aeroplane: Lockheed F-104A “Starfighter”
Engine: 1 G E J79

FAI Record File Num #9103 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 3 : turbo-jet
Type of record: Time to climb to a height of 15 000 m
Performance: 2 min 11.1s
Date: 1958-12-13
Course/Location: Point Mugu, CA (USA)
Claimant Einar Enevoldson (USA)
Aeroplane: Lockheed F-104A “Starfighter”
Engine: 1 G E J79

FAI Record File Num #9102 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 3 : turbo-jet
Type of record: Time to climb to a height of 20 000 m
Performance: 3 min 42.99s
Date: 1958-12-13
Course/Location: Point Mugu, CA (USA)
Claimant Einar Enevoldson (USA)
Aeroplane: Lockheed F-104A “Starfighter”
Engine: 1 G E J79

FAI Record File Num #9080 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 3 : turbo-jet
Type of record: Time to climb to a height of 25 000 m
Performance: 4 min 26.03s
Date: 1958-12-13
Course/Location: Point Mugu, CA (USA)
Claimant Einar Enevoldson (USA)
Aeroplane: Lockheed F-104A “Starfighter”
Engine: 1 G E J79

U.S. Air Force Lockheed F-104A-10-LO Starfighter 56-762 on the runaway at Naval Air Station Point Mugu, December 1958. (International F-104 Society)

Einar Enevoldson later flew as a civilian test pilot for NASA from 1968 to 1986 and was awarded the NASA Exceptional Service Medal. He holds numerous FAI world records.

Lockheed F-104A-10-LO Starfighter 56-762 climbing under Southern California's overcast coastal skies. (International F-104 Society) — Lockheed F-104A-10-LO Starfighter 56-762 climbing under Southern California’s overcast coastal skies. (International F-104 Society)

The Lockheed F-104A Starfighter was a single-place, single-engine supersonic interceptor. It was designed by a team lead by the legendary Clarence L. “Kelly” Johnson. The F-104A was 54 feet, 8 inches (16.662 meters) long with a wingspan of 21 feet, 9 inches (6.629 meters) and overall height of 13 feet, 5 inches (4.089 meters). It had an empty weight of 13,184 pounds (5,980.2 kilograms), combat weight of 17,988 pounds (8,159.2 kilograms), gross weight of 22,614 pounds (10,257.5 kilograms) and a maximum takeoff weight of 25,840 pounds (11,720.8 kilograms). Internal fuel capacity was 897 gallons (3,395.5 liters).

The F-104A was powered by a single General Electric J79-GE-3A engine, a single-spool axial-flow afterburning turbojet, which used a 17-stage compressor and 3-stage turbine. The J79-GE-3A is rated at 9,600 pounds of thrust (42.70 kilonewtons), and 15,000 pounds (66.72 kilonewtons) with afterburner. The engine is 17 feet, 3.5 inches (5.271 meters) long, 3 feet, 2.3 inches (0.973 meters) in diameter, and weighs 3,325 pounds (1,508 kilograms).

The F-104A had a maximum speed of 1,037 miles per hour (1,669 kilometers per hour) at 50,000 feet (15,240 meters). Its stall speed was 198 miles per hour (319 kilometers per hour). The Starfighter’s initial rate of climb was 60,395 feet per minute (306.8 meters per second) and its service ceiling was 64,795 feet (19,750 meters).

Armament was one General Electric M61 Vulcan six-barreled revolving cannon with 725 rounds of 20 mm ammunition. An AIM-9B Sidewinder heat-seeking air-to-air missile could be carried on each wing tip, or a jettisonable fuel tank with a capacity of 141.5 gallons (535.6 liters).

Lockheed built 153 of the F-104A Starfighter initial production version. A total of 2,578 F-104s of all variants were produced by Lockheed and its licensees, Canadair, Fiat, Fokker, MBB, Messerschmitt, Mitsubishi and SABCA. By 1969, the F-104A had been retired from service. The last Starfighter, an Aeritalia-built F-104S ASA/M of the Aeronautica Militare Italiana, was retired in October 2004.

The same type aircraft as that flown by Einar K. Enevoldson, this is a Lockheed F-104A-10-LO Starfighter, 56-761. It is carrying both wingtip and underwing fuel tanks. (U.S. Air Force)

¹ 56-762 was one of three F-104As later converted to an NF-104A rocket/turbojet Advanced Aerospace Trainer. It is the same Starfighter that crashed when Chuck Yeager had to eject after it went into an uncontrolled spin during a zoom-climb altitude record attempt, 10 December 1963.

Colonel Charles E. Yeager, U.S. Air Force, wearing a David Clark Co. A/P22S-2 full-pressure suit, accompanied by Major Ralph N. Richardson of the Aviation Physiology Laboratory, Richardson, walks to a Lockheed NF-104A Aerospace Trainer at Edwards Air Force base. (U.S. Air Force) — Colonel Charles E. Yeager, U.S. Air Force, wearing a David Clark Co. A/P22S-2 full-pressure suit, accompanied by Major Ralph N. Richardson of the Aviation Physiology Laboratory, walks to a Lockheed NF-104A Aerospace Trainer at Edwards Air Force Base. (U.S. Air Force)

10 December 1963: In an attempt to set a world absolute altitude record, Colonel Charles E. (“Chuck”) Yeager, U.S. Air Force, took a Lockheed NF-104A Starfighter Aerospace Trainer, 56-0762, on a zoom climb profile above 100,000 feet (30,480 meters) at Edwards Air Force Base, in the high desert of southern California. This was Colonel Yeager’s fourth attempt at the record.

Colonel Charles E. Yeager, U.S. Air Force, in the cockpit of a Lockheed NF-104A Aerospace Trainer, at Edwards Air Force Base, California, 1963. (U.S. Air Force)

The zoom climb maneuver was planned to begin with the NF-104A in level flight at 0.85 Mach and 35,000 feet (10,668 meters). The pilot would then accelerate in Military Power and light the afterburner, which increased the J79 turbojet engine’s 9,800 pounds of thrust (43.59 kilonewtons) to 15,000 pounds (66.72 kilonewtons). The modified Starfighter was to continue accelerating in level flight. On reaching Mach 2.2, the Colonel Yeager would ignite the Rocketdyne AR2–3 rocket engine, which burned a mixture of JP-4 and hydrogen peroxide to produce 6,600 pounds of thrust (29.36 kilonewtons).

Lockheed NF-104 Aerospace Trainer zoom-climb profile. (U.S. Air Force via NF-104.com)

When the AST reached Mach 2.5, Yeager was to begin a steady 3.5G pull-up until the interceptor was in a 70° climb. At 75,000 feet (22,860 meters), he would shut off the afterburner to avoid exceeding the turbojet’s exhaust temperature (EGT) limits. Yeager would then gradually reduce the jet engine power to idle by 85,000 feet (25,908 meters), and then shut it down. Without the engine running, cabin pressurization would be lost and his A/P22S-2 full-pressure suit would inflate.

One of the three Lockheed NF-104A Starfighter Aerospace Trainers, 56-756, in a zoom-climb with the rocket engine firing. (U.S. Air Force)

The NF-104A would then continue to zoom to an altitude where its aerodynamic control surfaces were no longer functional. It had to be controlled by reaction jets in the nose and wing tips. The pilot had to use the reaction control thrusters to pitch the AST’s nose down before reentering the atmosphere, so that it would be in a -70° dive. The windmill effect of air rushing into the intakes was used to restart the jet engine.

Yeager’s NF-104A out of control. This is a still frame from cine film shot at a distance of 20 miles (32 kilometers). (U.S. Air Force)

The 10 December flight did not proceed as planned. Chuck Yeager reached a peak altitude of approximately 108,000 feet (32,918 meters), nearly two miles (3.2 kilometers) lower than the record altitude set by Major Robert W. Smith just four days earlier.

On reentry, Yeager had the Starfighter incorrectly positioned with only a -50° nose-down pitch angle, rather than the required -70°.

The Starfighter entered a spin.

Without air flowing through the engine intakes because of the spin, Yeager could not restart the NF-104’s turbojet engine. Without the engine running, he had no hydraulic pressure to power the aerodynamic flight control surfaces. He was unable to regain control the airplane. Yeager rode the out-of-control airplane down 80,000 feet (24,384 meters) before ejecting.

“The data recorder would later indicate that the airplane made fourteen flat spins from 104,000 until impact on the desert floor. I stayed with it through thirteen of those spins before I punched out. I hated losing an expensive airplane, but I couldn’t think of anything else to do. . . I went ahead and punched out. . . .”

— Yeager, An Autobiography, by Brigadier General Charles E. Yeager, U.S. Air Force (Retired) and Leo Janos, Bantam Books, New York, 1985, at Pages 279–281.

NF-104A 56-762 crashed at N. 35° 7′ 25″, W. 118° 8′ 50″, about one mile (1.6 kilometers) north of the intersection of State Route 14 and State Route 58, near California City. The airplane was completely destroyed.

Chuck Yeager was seriously burned by the ejection seat’s internal launch rocket when he was struck by the seat which was falling along with him.

This incident was dramatized in the 1983 movie, “The Right Stuff,” (based on Tom Wolfe’s book of the same title), with Yeager portrayed by actor Sam Shepard.

Actor Sam Shepard portrayed Colonel Charles E. Yeager in the 1983 movie, "The Right Stuff", written and directed by Philip Kaufman for The Ladd Company, and based on the book by Tom Wolfe. The airplane behind Mr. Shepard is a Fokker-built F-104G Starfighter, 63-13269. — Actor Sam Shepard portrayed Colonel Charles E. Yeager in the 1983 movie, “The Right Stuff”, written and directed by Philip Kaufman for The Ladd Company, and based on the book by Tom Wolfe. The airplane behind Mr. Shepard is a Fokker-built F-104G Starfighter, 63-13269. (Warner Bros.)

56-762 was a Lockheed F-104A-10-LO Starfighter, one of three taken from storage at The Boneyard at Davis-Monthan Air Force Base, Tucson, Arizona, and sent to Lockheed for modification to Aerospace Trainers (ASTs).

These utilized a system of thrusters for pitch, roll and yaw control at altitudes where the standard aerodynamic control surfaces could no longer control the aircraft. This was needed to give pilots some experience with the reaction control system for flight outside the Earth’s atmosphere.

The F-104A vertical fin was replaced with the larger fin and rudder from the two-place F-104B for increased stability. The wings were lengthened for installation of the Reaction Control System. The fiberglass nosecone was replaced by an aluminum skin for the same reason. The interceptor’s radar and M61 Vulcan cannon were removed and tanks for rocket fuel and oxidizers, nitrogen, etc., installed in their place. The standard afterburning General Electric J79-GE-3B turbojet engine remained, and was supplemented by a Rocketdyne AR2–3 liquid-fueled rocket engine which produced 6,600 pounds of thrust (29.36 kilonewtons) for up to 100 seconds.

On 13 December 1958, prior to its modification to an AST, Lockheed F-104A-10-LO Starfighter 56-762 was flown by 1st Lieutenant Einar K. Enevoldson, USAF, to seven Fédération Aéronautique Internationale (FAI) time-to-altitude world records at Naval Air Station Point Mugu, Californa (NTD).

Wreckage of Lockheed NF-104A 56-762, 10 December 1963. (U.S. Air Force)

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